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The graph shows the effect of temperature on the time taken to make yogurt - Edexcel - GCSE Biology - Question 4 - 2013 - Paper 1
Question 4
The graph shows the effect of temperature on the time taken to make yogurt. (a) (i) Use the graph to estimate the optimum temperature for yogurt production. (ii) D... show full transcript
Worked Solution & Example Answer:The graph shows the effect of temperature on the time taken to make yogurt - Edexcel - GCSE Biology - Question 4 - 2013 - Paper 1
Step 1
Step 2
Describe how microorganisms change milk into yogurt.
Answer
Microorganisms, mainly bacteria, play a crucial role in transforming milk into yogurt. They act on lactose in the milk, converting it into lactic acid. This process lowers the pH of the milk, which subsequently causes the milk proteins to coagulate, resulting in the thickening and setting of the milk into yogurt.
Step 3
Describe the advantages of using microorganisms to produce food.
Answer
Microorganisms are advantageous in food production due to several reasons: they can enhance flavor and texture, improve nutritional value, and help in preservation by outcompeting spoilage organisms. Additionally, they can be produced quickly and efficiently, making food production more sustainable.
Step 4
Step 5
Describe the advantages of making cheese using the enzyme produced by genetically modified yeast.
Answer
Using enzyme from genetically modified yeast for cheese production has distinct advantages. It can lead to a more efficient coagulation process, often resulting in better texture and flavor. Furthermore, such enzymes are stable at a wider range of temperatures, allowing for more flexibility in the cheese-making process.